Drive head for driving pipes



P 1930. c. c. HANSEN 1,774,884 DRIVE HEAD FOR DRIVING PIPES Filed Jan. 28, 1928 a 7 E i v v INVENTOR:

' Patented Sept, 2 a

COMPANY, or'JERsEY CITY, NEW JERSEY, A CORPORATION on NEW, messy- DRIVE HEAD nontniarvine PIPES 1 l Application filed January 28, 1928;; Serial 250,288

This: invention relates to rock drills, but" more particularly to a'drivin'g'head 'adaptedf to be disposed on the end of a rock drill for guiding a pipe during the driving thereof through the strata overlying intended to be drilled. v i

The objects of the invention-are to obviate the necessity, of removing loose soil. or overburden overlying the rock and-to maintain the drill hole clean until it has been charged. I

Other objects will be inpart obvious-and in part pointed out hereinafter.

1n the drawings accompanying the speci fication and in which similar reference char- V I k clamping the block O/to the pipe'J. Inthe 'pre sent 'instance a set screw U is threaded into the block' Ot-o bearagainst the collarT acters refer to similar parts, j

' and a rock drill'illustrating'a practical application of the invention, and

' Figure 2's a sectional elevation of the drive. v head and the pipe. 1

R ferring more particularly to the drawings,A designates a drill wagon on which is mounted a vertical frame 13; The frame B has a pair of guide members Con which is slidably disposed a rock drill D. The rock drill D in this instance is secured to acarriage E mountedslidably on the guide menibe'rsC.

Suitable means are provided for raising v and lowering the rock drill D onthe guide members C. These means comprisea motorhoist F which may be mounted'on the drill wagon A to-wind, up or pay out a cable Grv attached at one end to the hoist F and with p its other end to the carriage E. Near the top of the guide members [C is arranged a sheave H which the cable G overruns and whereby said cable is maintained centrally between the v V p p p through to enable'the cuttings whichrise in thepipe J to pass through the hole WV to a I terial to be drilled, such as rock L. v The means providedfor this purpose consists of 7457 a block 0 whichimay' be of any suitable e'X- the material 3 V the-front head Q- Figure 1 is an elevation ofa drill wagon CHARLES o; HANSEN, or EASTT'ON, PENNSYLVANIA, 'Assieivon To' INGERsoLL-RAND te'r'ior formation and has a recess P, in'onef' end-to receive the ,end' of a-front'head Q1 of hemek drill D. The recess P may beef any suitabledepth and 'ispreferably' oiia diameter onlyslightlyjlarger than that'of 5 fl'n the opposite end of the blockO- isformed a recess R to receive the end of the pipe J.

The end ofthe pipe J I which iextendsint'o' the recess R1 may beffprovided withfexterior threads S to receivea sleeve or collar T threaded thereon for the purpose of reins forcing theend of thepipep Any 'snitable means may be provided for for thatpurpose; j U i v The pipeJ maybe of'a diameter to accomniodate the'particular size dr illbit which it v is desired to use and of a length to project hasbeen driven against the rock L.

above the soil o 'overburden K after the pipe e provided; with a knife-edge. V te -facilitate 1 Preferably the front end of the 1 59315 e thepassageof thepipej through the'soil K,

This lznife ed'ge may be formed eitlier by t'a pering the pipe on the'inside or on the out? side By-tapering thepipe on t he,.inside, however, as illustratedfthe material displacedby the Lpipe'will be directed more readily into, theinterior of thep'ipe and the pipe will alsoencounter less friction than would be the case if theknife-edge U were'formed in line with the innersurface of the pipe. The recesses Pand R are connected by a hole W of sufficiently larger cross sectional area than a drill steel X which extends there;

plurality of radial apertures Y inthe block 0 throughwhichsuchcuttings are expelled y from the pipe.

type which entendsinto and isguidedby the w front head QJ, To obtain. the best results,

- slightly exceed that of the pipe.

however, the bit Z should be of only slightly smaller diameter than; the interior of the pipe J so that the frontendof the pipe may be held in alignment with the rock drill by the drill steel and the length of the steel X should In practice, whenever it is desired to drive a pipe J into the soil K, a pipe J of suitable length may be inserted inthe recess R and clamped to the block by means oftne set screw U; The drill steel X may then be inserted inthe pipe J and the'a'ssembly isthen in; readiness to be disposed in operative, posi- I tion with respect to the rock drill l). After the drill steel X has been inserted in the front head Q, the rock drill may belowered so that the front end of therock drill will enterthe recess Pg. P

The rock drill D may then be setin oper ation'and the hoist F released to permit the entire weightof the rockdrill Djlto hear I be displaced by the bit. raised through the pipeinto the hole WV and against, block 0. The weight ofthe rocl: drill, together with-the vibration set up therein, will drive the pipe J into and through the soil K until its front 'e ndbears against the rock L. Inasmuch that the cutting bit Z of the drill steel projects slightly in advance ofthe front end of the pipe J, substantially all the soil in advance oi? the pipe will Suchsoi'l will be will then pass tov the exterior of the block through the apertures Y. As will be readily seen, the drill bit Z will remove substantially all the material so that only a slight amount requires tojbe displaced by the pipe v After the pipe J has been driveninto the soilK'to thereq ui'red deptln'the set screw may be unscrewed and the rock drill and block removed, leaving thepipeJ in the soil K for the succeeding operation of drilling the rock L, as well as. for charging the drill hole.

By permitting the pipe to remain in the 'soil "K, the drill hole will remain clean and e the deposit of soil into thedrill hole will be .ceive the end ofthe rocl; drill,a recess in the 7 other end of the drive head, a pipe encircling the drill steel and-extending into the intended'to be displaced into the pipe, said drive head having a hole connecting the recesses and through which the drill steel extends, radial apertures in the drive headleading from the hole to the atmosphere for conveying cuttings from the pipe and the block, and means for clamping the drive head to the pipe.

In testimony whereof I have signed this specification.

CHARLES C. HANSEN.

p in

last said recess, said pipe being guided atits free'endby the drill steel'and having a knife edgeon its free end toydirect -thematerial 

